Once and for all, let's start some How Tos. This one should be how to pull transmission codes. We should do another one for ABS codes.   So, here is how to read transmission codes using the "secret handshake" method.     Here is what those codes mean:   If the light blinks 2 times a second this means there are no codes.   If the light blinks 4 times a second this means there is a power supply or grounding problem.   If the light doesn't blink or show up then there is a problem with l